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The Brainliest Answer!
2015-02-21T13:21:10+05:30
Side =a
perimeter=4a
4a=20
a=20/4=5
side=5
2 5 2
2015-02-21T13:29:41+05:30
Let the side of the square be a.
Perimeter of square = 4a = 20
a =  5
Thus the side of the square is 5 units.
1 5 1